Fat is where most of our energy comes from in day to day life. That is where muscles are getting their energy by and large. The glycogen in the liver and glucose in the blood stream would not get you very far. When you go out for a walk, that energy is coming from fat -- not the glycogen in your liver. But we need sugar. The biggest problem is the brain. It cannot burn fat. The heart also uses a lot of sugar although it can shift over to more fat if need be. There is no pathway from fat to sugar. If you fast for a while then the body will start breaking down muscle to get the glucose it needs to feed the brain. The body can convert muscle to sugar. It cannot convert fat to sugar. We cannot just burn fat to stay warm. If we could, that would be great. We can burn fat to move muscles and that generally warms you up but in cold water moving muscles can work against you and eventually we get tired when moving muscles. When we go to sleep we get colder and if we are in extreme environment die. Even though there is plenty of fat to burn. On May 21, 2010, at 8:14 AM, PeterO wrote: > Regarding metabolising fat we might not be very good at it but we > can still > use it as an energy source although its last in speed of use in the > chain > from: blood sugar, glycogen in muscle, carbohydrate and then fat. > From your > comments it sounds as if we may not be able to metabolise fat fast > enough? *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Fri May 21 2010 - 17:57:33 PDT
This archive was generated by hypermail 2.4.0 : Thu Aug 21 2025 - 16:31:41 PDT